I don’t think Red Bull or Vettel are using anything that is not permitted within the existing rules. After his dominant win in Singapore, it was only Senor Minardi who voiced his doubts but those who do not like Vettel took-it up with glee. Alonso pooh-poohed such ideas and said that the RB9′s noise always sounded like that and it was no different in Singapore. Not one of the trackside stewards, officials, media personnel or staff of rival teams noticed anything amiss at the time.
Red Bull use the standard ECU supplied by McLaren to all teams. All cars are subject to parc ferme checks before and after the race. Therefore, if Newey has installed some clever engine mapping system to improve performance, it is clearly within the rules. That is fine since that is what F1 car designers and paid big bucks for.
The results we are seeing is due to a combination of a great driver driving a great car.